Knuckle-joint type press



Sept. 15, 1936. w. KLOCKE KNUCKLE JOINT TYPE PRESS Filed May 5, 1934 2Sheets-Sheet 1 INVENTOR.

W/LL/HM lfLOC/fE I .1- AT RNEY Sept. 15, 1936. w. KLOCKE KNUCKLE JOINTTYPE PRESS Filed May 5, 1934 INVENTOR. WILL/HM KL OC/FE' Patented Sept.15, 1936 UNITED PATENT O iFf FjllC-E KNUCKLE-J OIN T :PRESS Willi'amKlocke, Woodhaven,N. 52'. Application May 5,-1934,.Serial:No. 724,116

'Z-CI-aims. (01.78- 41) i This invention relates to presses ofthe-knucklejoint type and provides improvements.

Bressesof itherknuckle j oint type-heretofore in use .havesstrokes ofxfixedilength. Different types :5 of .work require greater length .ofstroke than others, :and .for most types of .work .there is .a length-.of :stroke :best suited -for performing it. Eonpress-users wwho vhavea variety of work to do, .presses .having a :fixed .stroke :fail to.meet their requirements in the imosttadvantageous .manner.

.Moreover, with much o'fithe work whichisdone .in knuckle-joint typepresses, particularly com- 7 ing stamping, .or embossing, .it .is often.necessary to .give' the "blank ,twostrokes .in-order to impart .thejun-design and .finish .of the .dies .to the work, -so that ,the workhas that quality referred .to-.as lifef.

The present inve'ntionprovides a -press of the knuckle-[joint type inwhich the length of the strokelmay be varied or adjusted to provide.substantially different lengths of .stroke, and thus enable the pressuser ito'set or adjust the stroke :to that best "meeting therequirements of the particular "work which heihas to do, and "for eachof avariety'of work. 7

The invention further provides an adjustable stroke press of theknuckle-joint type, having the "desirable feature of the tool-slide, foreach of various 'stroke adjustments, having approximate top-stroke orraised positions corresponding -to one and the same angular positionof arotating-part, so that a c1utch*may 'be provided :having its engagingand disengaging positions at 135 said one angular position a of saidrotating-part,

"and'whereby the clutch-operation may occur at the samepositionrorresponding to the top-stroke =-pos'itions-of the tool-slidefor various strokeadjus'tments.

I40 mm invention further provides :presses-o'f ithe :knucklejdint itypehaving a single-stroke or a double-stroke in-eachcycle, together withstroke- :adjustmen't.

.The invention:a1so provides -a press having the above-describedfeatures which is of :simple and Figs. 3 :and 4 are diagrammatic viewsillustrating the arrangement and operation of the stroke adjusting and=toolslide actuating parts.

Fig. :5 is a graph illustrating the "strokeadjustments.

Referring to said drawings, numeral 10 designates the press-frame,:having :a crown l2, and a bed l4, and l-6 "designates a 'reciprocatoryslide, the:die;parts orzforming-tools-,not.:shown) "being mountedrespectively-on the bed 'andaslide. V i10 Numerall-ZU designates aknucklee-joint connection :between rthezslide 4'6 1 and crown. .Thisconnection imay:be in the sform of levers or rlinks 2-2,'24,:bearing-pins 26,.2-1, 28,:andrstraps 30,3I at :the :sides of theknuckle-Elevers. connecting zthe 315 levers and :pins.

The :leverssare turned angularly to reciprocate lthe :tool-slide :by"suitable means, as a forked connectingqfod 33 :and;a:crank 35 onazrotatable shaft .36, which :may be connected and discon- .20 :nectedwith a: driving-part, :as:a fly-wheel driving pulleytKi-B, :through aclutch (not shown) -The ibearing-pin 26 through which the thrust .of thelevers :is rtransmitted to :the crown .12 .is usually molnitedinlahlock40 :held .up byrods (25 42, passing :through the .crown, and :springs144 ireacting against the .top of the acrown and .nuts on theircds 42.The :block 40 is movable :in dine "with fthe axis of reciprocation mfthe i001" slide 16 1by means 'ofia .wedge *48 arranged TbG- P30 .tweenthe crown 12 and block 40 so that fine (mi'crometric) adjustments of thebottom-ofitheestroke position :of tool-slide "[6 may be made in setting:the .dies. The wedge may be moved inwardly-or outwardly bya screw 150.The :block 3 :-and wedge construction is preferably is. apart 1'0'1 thepresent construction.

Means are provided according to this reinvention, iior varying oradjusting the length OfZlihfi s'trokeo'f'theitool-slide l6 to'providesubstantial ly-differen't lengths of stroke. In said embodi- 'm'ent, 'aslide 60 is provided in T'blOCk 40 and the bear'ing-p'in 26 is mountedin- !this slide. The slide 60 is movable transversely of the axis ofreciprocation of tool-slide I 6 :Iand :the transverse E45 movement ofthe slide 60 may be effected through an :adjusting screw 62 and lhandwheel 63. The screw acts to hold the slide in the different positions towhich it is adjusted.

The adjustments of,the strokes of tool-slide 50 I6 and the arrangementof the slide and its connections, are illustrated in the diagrams Figs.

4 and 5. An infinite number of adjustments of the stroke-lengths withina given range may be effected by the adjusting means. In Fig. 3 thetool-slide I6 is shown at the bottom of its stroke for twostroke-adjustments at the extremes permitted by the particularstructures illustrated, and in Fig. 4 the tool-slide I6 is shown at thetop of its stroke for the same two stroke-adjustments illustrated inFig. 3, the positions of the parts for the long-stroke adjustment beingshown in full lines, and for the short-stroke adjustment being shown indotted lines, in each figure. As the slide 60 is move-d to the left fromthe position shown in full lines a lesser and lesser amount of angularmovement is imparted to the knuckle jointed levers, and a shorter andshorter stroke is provided. Five positions of adjustment of slide 60 areindicated by the line-marks 65 above the slide 60 in Figs. 3 and 4 andthe substantially different stroke-lengths for the five positions ofadjustment indicated by said line-marks 65 are slide 60, connecting-rd33and crank 35 are so arranged that the tool-slide I 6 for each of variousstroke-adjustments, has approximate top-stroke V orjra'ised positionscorresponding to one angular imparting two strokes of the tool-slide of.crank 35;

position of crank-shaft 36 indicated at '10. The clutch usually employedon'pre sses is preferably arranged tov operate at said angular position10, as here it operates at the top-positions of the punch-slide I6 forvarious adjustments of stroke, and also the weight of the tool-slide. l6in said angular positions acts against the'bearings of shaft 36 and thislooks the slide I6 in its raised position. The position of the parts inthe raised or top-stroke position of the tool-slide 16 for thelongestland shortest strokes provided by the stroke-adjustment-meansillustrated, is

shown in Fig. 4, and it will be observed that the. thrust of theconnecting-rod 33 under the weight of tool-slide I6 is in each instancealmost in direct line with the bearings of shaft 36, and for positionsintermediate these shown in Fig. 4, the direction of thrust of rod'33would be approximately the same, i. e. against bearing 36..

Means are also provided by the invention for each cycle of the press, sothat the work between the dies is given two strokes or squeezes tobetter bring out the design of the dies on the work. An embodiment ofsaid means is illustrated in Figs. 1-4, and the construction andarrangement of the parts is such that when the bearing-slide 60 is inany of its positions except those proximate that shown in full linesFigs. 3 and 4, the tool-slide i6 has two strokes for each revolutionTake for example, the positions shown in dotted lines Fig. 3. At the twopoints 15.16, the tool-slide lliwillbe brought to its bottom-position,and thereby two strokes imparted to the slide in one revolution of crank35. By arranging the connecting-rod 33 so that it is effectively shorterthan the distance between the knuckle-levers 22,- 23 in their positionof alinement, and the position of the crank 35 at the limit of its throwindicated at 80, Fig. 3,

the tool-slide l6 will be given two strokes in each revolution of thecrank 35, or cycle. When the bearing and slide 60 is in its positionsproximate that shown in full lines Fig. 3, the tool-slide I6 has onestroke in each cycle. By limiting the range of adjustment of slide 60 topositions proximate the full-line position Fig. 3; adjustable singlestrokes may be obtained, and by excluding from the range of adjustmentof slide 60 the positions proximate to the full-line position Fig. 3,adjustable double strokes may be obtained. With the full range ofadjustment of slide 60 shown in Fig. 3, the invention provides anadjustable stroke-press having a tool-slide having single strokes anddouble-strokes in each cycle. The operation has been explained above inconnection with the description of the construction.

The invention may receive other embodiments than those hereinspecifically illustrated and described.

What is claimed is: V 7 I V 1. A knuckle-joint type press, comprising aframe, a reciprocatory tool-slide, knuckle-jointed levers connected attheir ends to the slide and frame respectively, driving means connectedto said knuckle-jointed levers for turning them about said joint to andfrom alinement, adjusting 'means for varying'the amount of angularmovement imparted to said levers to provide substantially differentlengths of the stroke of said slide for doing different kinds of work,said adjusting means comprising a slide and a bearing thereon for oneend of said jointed levers, said slide and bearing together beingmovable,.transversely of the'axis of reciprocation of said toolslide, toanyone of a numberof adjusted positions, and means for holding saidslide and the bearing thereon in any position to which they have beenadjusted, throughout the operation of.

the press for doing a particular kind of work.

2. A knuckle-joint type press, comprising a frame, a reciprocatorytoo1-slide,. knuckle jointed levers connected at their ends to the slideand frame respectively,'driving means connected'to said knuckle-jointedlevers for turning them about said joint to and from alinement,adjustingmeans for varying the amount of angular movement imparted tosaid levers toprovide sub: stantially different lengths of the stroke ofsaid slide for doing different kinds of work, said adjusting meanscomprising a block, a slide and a bearing thereon for one end of saidjointed levers, said slide and bearing together being movable on saidblock, transversely of the axis of reciprocation of said tool-slide, toany one of a number of adjusted positions, means for holding said slideand the bearing thereon, on said block in any position to which theyhave been adjusted,

throughout the operation of the press for doing

